i know many versions quote 蝶影紅梨記亭段 using 金線吊芙蓉, I beg to differ, i think it's a misquote, it should be 士工慢板板面 (like manfungau said, 金線吊芙蓉是慢板的一種板面). There are other instances of misquote because the first line sounds the same, as in 花田错会, i think it's a misquote, it should be 士工慢板板面, I have consulted with a few musicians playing the instruments and they all said those are 士工慢板板面. But I also disagree 首次和唯一的一次運用金線吊芙蓉, like in 再世红梅记 闹府装疯, when 白雪仙 and others started to leave, 金線吊芙蓉慢板 is used... my 2 cent